LOANS HELD FOR SALE, AT FAIR VALUE - Components of Gain on Origination and Sale of Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Receivables [Abstract]
(Discount) premium from loan sales	$ (437,194)	$ 407,314	$ (673,291)	$ 877,887
Servicing rights	180,455	427,458	450,215	957,002
Unrealized losses from derivative assets and liabilities	(190,545)	(510,788)	(31,803)	(182,467)
Realized gains from derivative assets and liabilities	553,834	250,912	902,875	350,548
Discount points, rebates and lender paid costs	71,767	(28,603)	131,834	(143,458)
Fair value gain (loss)	50,618	145,653	(174,519)	(33,191)
Provision for loan loss obligation for loans sold	(82,373)	533	(95,619)	(267)
Total gain on origination and sale of loans, net	146,562	$ 692,479	509,692	$ 1,826,054
Loans held for sale on non-accrual status	$ 23,700		$ 23,700		$ 28,800